Keyphrases
- question answering
- knowledge discovery
- information retrieval
- natural language processing
- question classification
- information extraction
- association rules
- data mining
- cross language
- named entities
- natural language
- syntactic information
- natural language questions
- sentence retrieval
- machine learning
- qa clef
- databases
- data mining techniques
- passage retrieval
- text mining
- data analysis
- question answering systems
- qa systems
- candidate answers
- relation extraction
- artificial intelligence
- information retrieval systems
- answer validation